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Finding the Fourth Proportional to 304,128, 419,679.70 and 168,153.78

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Solution

The fourth proportional to 304,128, 419,679.70 and 168,153.78 is: 232,042.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,128 : 419,679.70 = 168,153.78 : x
  2. Step 2: Convert to fraction form
    304,128/419,679.70 = 168,153.78/x
  3. Step 3: Cross multiply
    304,128x = 419,679.70 × 168,153.78
  4. Step 4: Simplify right side
    304,128x = 70,570,727,944.27
  5. Step 5: Solve for x
    x = 70,570,727,944.27/304,128
  6. Step 6: Final answer
    x = 232,042.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.